That week, Cressey and his business partner, Tony Gentilcore, took Collins
out to a track to see what they had to work with.
In his study published in the Journal of Strength and
Conditioning Research in 2007, Cressey found that adding unstable surface training-
even when it took up just 2 percent of a strength and conditioning program- curbed overall speed and agility gains.
In his study published in The Journal of Strength and
Conditioning Research in 2007, Cressey found that adding unstable surface training,
even when it took up just two percent of a strength and conditioning program, curbed overall speed and agility gains.